CN111551477A - Barrier performance test system and method - Google Patents
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- 230000004888 barrier function Effects 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011056 performance test Methods 0.000 title description 11
- 238000012360 testing method Methods 0.000 claims abstract description 229
- 239000007789 gas Substances 0.000 claims abstract description 202
- 238000005259 measurement Methods 0.000 claims abstract description 172
- 239000012159 carrier gas Substances 0.000 claims abstract description 170
- 230000035699 permeability Effects 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims description 42
- 238000010926 purge Methods 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 29
- 238000007789 sealing Methods 0.000 description 24
- 239000004519 grease Substances 0.000 description 9
- 239000005022 packaging material Substances 0.000 description 7
- 230000035515 penetration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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Abstract
The invention relates to a barrier property test system and a method, and provides a barrier property tester, wherein a test sample divides a test chamber into a sample gas chamber and a measurement chamber. The method for testing the barrier property comprises the following steps: and loading carrier gas into the sample gas chamber and the measuring chamber, emptying the sample gas chamber and the measuring chamber of residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measuring chamber after a period of time, and calculating the background error of the barrier property tester. And loading the test gas in the sample gas chamber, allowing the test gas to enter the measurement chamber through the test sample, detecting the content of the target component in the carrier gas flowing through the measurement chamber, and calculating the test permeability. And calculating the difference value between the test permeability and the background error to obtain the gas permeability of the sample. The gas permeability of the sample can be obtained by calculating the difference between the test permeability and the background error, so that the influence of the installation error of the test sample and the installation error of the measuring chamber component on the measurement can be eliminated, and the test precision of the barrier test performance is improved.
Description
Technical Field
The invention relates to the technical field of barrier performance testing, in particular to a barrier performance testing system and a method.
Background
With the development of packaging material technology, the packaging material not only is simple for packaging products, but also needs to have better barrier property so as to ensure the barrier protection effect of the packaging material. Barrier properties refer to the ability of a packaging material to resist penetration from one side of the packaging material to another side of the packaging material for a particular penetration target, and are an important consideration in packaging materials. Due to the installation error of the barrier property testing instrument, the outside air easily enters the measuring chamber of the barrier property testing instrument from the position of the installation error, so that the precision of the barrier property testing is low.
Disclosure of Invention
Therefore, it is necessary to provide a barrier performance testing system and method, which can improve the accuracy of the barrier performance test.
A method for testing barrier property is provided, a barrier property tester is provided, a test sample divides a test chamber into a sample gas chamber and a measurement chamber, and the method for testing barrier property comprises the following steps:
purging carrier gas to the sample gas chamber and the measuring chamber, emptying residual and adsorbed target components in the sample gas chamber and the measuring chamber, detecting the content of the target components in the carrier gas flowing through the measuring chamber after a period of time, and calculating the background error of the barrier property tester;
loading a test gas into the sample gas chamber, wherein the test gas enters the measuring chamber through the test sample, detecting the content of a target component in the carrier gas flowing through the measuring chamber, and calculating the test permeability;
and calculating the difference value of the test permeability and the background error to obtain the gas permeability of the sample.
In the method for testing barrier properties, due to installation errors of the test sample, for example, volatilization of sealing grease at a sealing joint part and a sealing joint part of the test sample and the measuring chamber, and installation errors of components of the measuring chamber, external gas enters the measuring chamber, thereby affecting the accuracy of the barrier property test. Therefore, the scheme measures the background error of the obstruction tester, and particularly evacuates the sample air chamber and the target components remained and adsorbed in the measuring chamber through carrier gas; after a period of time, the external gas enters the measuring chamber from the positions of the test sample and the installation errors of the measuring chamber components, the content of the target component in the carrier gas flowing through the measuring chamber is detected, and the background error of the barrier property tester is calculated. The gas permeability of the sample can be obtained by calculating the difference between the test permeability and the background error, so that the influence of the installation error of the test sample and the installation error of the measuring chamber component on the barrier performance measurement can be eliminated, and the test precision of the barrier test performance is improved.
In one embodiment, in the step of purging a carrier gas to the sample gas chamber and the measurement chamber, evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber after a period of time, and calculating the background error of the barrier performance tester, the sample gas chamber and the measurement chamber are purged by using a high-purity gas without the target components.
In one embodiment, the step of purging a carrier gas to the sample gas chamber and the measurement chamber, evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber after a period of time, and calculating the background error of the barrier performance tester comprises:
closing the test gas inlet valve of the sample gas chamber;
opening a background carrier gas inlet valve and an exhaust valve of the sample gas chamber;
and controlling a background carrier gas flow meter of the sample gas chamber to enable carrier gas to purge the sample gas chamber at a certain flow rate, and discharging the purged carrier gas through the exhaust valve.
In one embodiment, the step of purging a carrier gas to the sample gas chamber and the measurement chamber, evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber after a period of time, and calculating the background error of the barrier performance tester further includes:
opening a carrier gas inlet valve of the measuring chamber;
closing a protection valve of the measurement chamber;
and switching an outlet valve of the measuring chamber to an external discharge port, controlling a carrier gas flow device of the measuring chamber to enable the carrier gas to purge the measuring chamber at a certain flow rate, and discharging the purged carrier gas from the external discharge port.
In one embodiment, after the step of evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, the method further comprises:
maintaining a carrier gas inlet valve of the measurement chamber in an open state;
opening a protection valve of the measurement chamber;
and switching the outlet valve to a measurement outlet, controlling a carrier gas flow device of the measurement chamber to enable carrier gas to flow through the measurement chamber, the measurement outlet and the component detection part at a certain flow rate, and after a period of time, performing target component detection on the discharged carrier gas by the component detection part to calculate the background error value of the barrier performance tester.
In one embodiment, after the steps of purging a carrier gas to the sample gas chamber and the measurement chamber, evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber after a period of time, and calculating a background error of the barrier performance tester, the method further includes:
judging whether the background error is larger than a preset value: if the background error is larger than the preset value, sending out an alarm, and selecting to test or stopping the test; if the background error is smaller than the preset value, no warning is sent, the test gas is directly loaded into the sample gas chamber, the test gas enters the measuring chamber through the test sample, the content of the target component in the carrier gas flowing through the measuring chamber is detected, and the test permeation amount is calculated.
In one embodiment, loading the sample gas chamber with a test gas, the test gas passing through the test sample into the measurement chamber, detecting the amount of the target component in the carrier gas flowing through the measurement chamber, and calculating the test permeation amount comprises:
loading the measurement chamber with a carrier gas;
opening a protection valve of the measurement chamber;
and switching the exhaust valve of the measuring chamber to a measuring outlet, controlling a carrier gas flow device of the measuring chamber to enable the carrier gas to flow through the measuring outlet and the component detection piece from the measuring chamber at a certain flow rate, and performing target component detection on the discharged carrier gas by the component detection piece to calculate the test permeability.
In one embodiment, the step of loading a test gas into the sample gas chamber, the test gas entering the measurement chamber through the test sample, detecting a content of a target component in a carrier gas flowing through the measurement chamber, and calculating a test permeation amount includes detecting a content of the target component in the measurement chamber after the target component in the sample gas chamber and the target component in the measurement chamber reach equilibrium, and calculating the measurement permeation amount based on a measurement value of the component detecting member.
A barrier property test system adopts the barrier property test method; the barrier property testing system comprises a testing gas source, a testing gas inlet valve, a carrier gas source, a background carrier gas inlet valve, a temperature and humidity detection piece and a component detection piece, wherein the testing gas source is communicated with the sample gas chamber through the testing gas inlet valve, and the temperature and humidity detection piece measures the temperature and humidity of the sample gas chamber; the carrier gas source is communicated with the sample gas chamber through the background carrier gas inlet valve, the carrier gas source is communicated with the measuring chamber through the carrier gas inlet valve, and the component detecting piece detects the content of the target component in the measuring chamber.
In one embodiment, the test chambers are provided with at least two test chambers, the carrier gas source is communicated with each sample gas chamber through the background carrier gas inlet valve, the carrier gas source is communicated with each measurement chamber through the carrier gas inlet valve, the test gas source is communicated with each sample gas chamber through the test gas inlet valve, each sample gas chamber is correspondingly provided with the temperature and humidity detection piece, each measurement chamber is correspondingly provided with the component detection piece, or the component detection piece is provided with one, and the component detection piece can measure the content of each target component in the measurement chamber.
The barrier performance test system adopts the barrier performance test method to test the barrier performance. Due to the installation error of the test sample, for example, the sealing joint part of the test sample and the measuring chamber, the volatilization of the sealing grease of the sealing joint part, and the installation error of the components of the measuring chamber, the external air enters the measuring chamber, thereby affecting the accuracy of the barrier performance test. Therefore, the scheme measures the background error of the obstruction tester, and particularly evacuates the sample air chamber and the target components remained and adsorbed in the measuring chamber through carrier gas; after a period of time, the external gas enters the measuring chamber from the positions of the test sample and the installation errors of the measuring chamber components, the content of the target component in the carrier gas flowing through the measuring chamber is detected, and the background error of the barrier property tester is calculated. The gas permeability of the sample can be obtained by calculating the difference between the test permeability and the background error, so that the influence of the installation error of the test sample and the installation error of the measuring chamber component on the barrier performance measurement can be eliminated, and the test precision of the barrier test performance is improved.
Drawings
Fig. 1 is a first flowchart of a barrier performance testing method according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a barrier performance testing method according to an embodiment of the invention;
fig. 3 is a flow chart of a barrier performance testing method according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a single barrier performance testing system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a multiple barrier performance testing system according to one embodiment of the present invention;
figure 6 is a schematic structural diagram of a multiple barrier performance testing system according to another embodiment of the present invention.
Description of the drawings:
10. the device comprises a test chamber, 11, a sample gas chamber, 111, a test gas inlet valve, 112, a background carrier gas inlet valve, 113, an exhaust valve, 114, a background carrier gas flow meter, 12, a measurement chamber, 121, a carrier gas inlet valve, 122, a carrier gas flow meter, 123, a protection valve, 124, an outlet valve, 1241, an exhaust outlet, 1242, a measurement outlet, 13, sealing grease, 14, a sealing ring, 20, a test sample, 30, a test gas source, 40, a carrier gas source, 50, a temperature and humidity detection piece, 60 and a component detection piece.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, in an embodiment of a method for testing barrier properties, a barrier property tester is provided, and a test sample 20 divides a test chamber 10 into a sample gas chamber 11 and a measurement chamber 12. The method for testing the barrier property comprises the following steps:
s10, purging carrier gas to the sample gas chamber 11 and the measuring chamber 12, emptying the residual and adsorbed target components in the sample gas chamber 11 and the measuring chamber 12, detecting the content of the target components in the carrier gas flowing through the measuring chamber 12 after a period of time, and calculating the background error of the barrier performance tester;
s20, loading a test gas into the sample gas chamber 11, enabling the test gas to enter the measurement chamber 12 through the test sample 20, detecting the content of the target component in the carrier gas flowing through the measurement chamber 12, and calculating the test permeation amount;
and S30, calculating the difference between the test permeability and the background error to obtain the gas permeability of the sample.
In the method for testing barrier properties, due to the installation error of the test sample 20, for example, the sealing joint portion between the test sample 20 and the measurement chamber 12, the volatilization of the sealing grease 13 at the sealing joint portion, and the installation error of the components of the measurement chamber 12, the external air enters the measurement chamber 12, thereby affecting the accuracy of the barrier property test. Therefore, the scheme measures the background error of the obstruction tester, and particularly evacuates residual and adsorbed target components in the sample air chamber 11 and the measuring chamber 12 through carrier gas; after a period of time, the external gas enters the measuring chamber 12 from the positions of the test sample 20 and the installation errors of the components of the measuring chamber 12, the content of the target component in the carrier gas flowing through the measuring chamber 12 is detected, and the background error of the barrier property tester is calculated. The gas permeability of the sample can be obtained by calculating the difference between the test permeability and the background error, so that the influence of the installation error of the test sample 20 and the installation error of the measurement chamber 12 component on the barrier performance measurement can be eliminated, and the test precision of the barrier test performance is improved.
It should be noted that the above background error refers to an installation error of the test sample 20, for example, a sealing joint portion between the test sample 20 and the measurement chamber 12, a sealing grease 13 volatilization at the sealing joint portion, and a test error caused by an installation error of a component of the measurement chamber 12 causing external air to enter the measurement chamber 12, and the background error affects the precision of the barrier performance test. And (3) emptying residual and adsorbed target components in the sample air chamber 11 and the measuring chamber 12, and detecting the content of the target components in the carrier gas flowing through the measuring chamber 12 after a period of time so as to calculate the background error of the barrier property tester.
Specifically, the above-mentioned test gas contains a target component to be permeated or blocked, such as water vapor or the like, and the outside gas also contains the target component.
In one embodiment, during use of the barrier tester, the amount of gas entering the measurement chamber 12 from the location of the test sample 20 and the mounting error of the components of the measurement chamber 12 may vary, and the mounting error of the test sample 20 may vary from one tester to another, thus requiring one measurement of the background error for each test sample 20 measurement. The gas permeability of the sample is obtained by calculating the difference between the measured permeability and the background error, so that the influence of the installation error of the test sample 20 and the installation error of the measurement chamber 12 component on the measurement can be eliminated, and the testing precision of the barrier performance is improved. Moreover, each test sample 20 is measured for a background error, so that the operation requirement of a tester for installing the sample can be reduced, and the test precision of the barrier property is improved.
In one embodiment, the sample gas chamber 11 and the measurement chamber 12 purge the carrier gas, the sample gas chamber 11 and the measurement chamber 12 are evacuated of residual and adsorbed target components, and after a period of time, the content of the target components in the carrier gas flowing through the measurement chamber 12 is detected, and the background error of the barrier performance tester is calculated in step S10, the sample gas chamber 11 and the measurement chamber 12 are purged with a high purity gas that does not contain the target components. Specifically, the high purity gas may be oxygen or the like. The sample gas chamber 11 and the measuring chamber 12 are purged by high-purity gas without target components, so that residual and adsorbed target components in the sample gas chamber 11 and the measuring chamber 12 can be emptied; after a period of time, the target component of the measuring chamber 12 is only from the outside air entering the measuring chamber 12 from the position of the installation error of the test sample 20 and the components of the testing chamber 10, so that the measurement accuracy of the background error can be ensured, and the precision of the barrier performance test is improved. Of course, in other embodiments, the sample gas chamber 11 and the measurement chamber 12 may be purged with high purity helium gas, high purity hydrogen gas, high purity nitrogen gas, or the like.
In one embodiment, referring to fig. 1, fig. 2 and fig. 4, the step S10 of purging the carrier gas from the sample gas chamber 11 and the measurement chamber 12, evacuating the sample gas chamber 11 and the measurement chamber 12 of the residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber 12 after a period of time, and calculating the background error of the barrier performance tester includes:
s11, closing the test gas inlet valve 111 of the sample gas chamber 11;
s12, opening a background carrier gas inlet valve 112 and an exhaust valve 113 of the sample gas chamber 11;
s13, controlling the background carrier gas flow meter 114 of the sample gas chamber 11 to make the carrier gas purge the sample gas chamber 11 at a certain flow rate, and discharging the purged carrier gas through the exhaust valve 113.
It should be noted that, referring to fig. 2 and fig. 4, the testing gas source 30 is communicated with the sample gas chamber 11 through the testing gas inlet valve 111, and the testing gas inlet valve 111 is closed, so that the testing gas does not enter the sample gas chamber 11 any more, and the testing gas is prevented from affecting the accuracy of the background error measurement. The carrier gas source 40 is communicated with the sample gas chamber 11 through the background carrier gas inlet valve 112 and the background carrier gas flow meter 114, when the background error needs to be measured, the background carrier gas inlet valve 112 is opened, and the background carrier gas flow meter 114 is controlled to enable the carrier gas to purge the sample gas chamber 11 at a certain flow rate. The purged carrier gas is discharged through the exhaust valve 113, and the target component in the sample gas chamber 11 is taken out in the process of the discharge of the carrier gas, so that the accuracy of background error measurement can be ensured, and the precision of the barrier property test can be improved.
In one embodiment, referring to fig. 1, fig. 2 and fig. 4, the step S10 of purging the carrier gas from the sample gas chamber 11 and the measurement chamber 12, evacuating the sample gas chamber 11 and the measurement chamber 12 of the residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber 12 after a period of time, and calculating the background error of the barrier performance tester further includes:
s14, opening the carrier gas inlet valve 121 of the measurement chamber 12;
s15, closing the protection valve 123 of the measuring chamber 12;
s16, the outlet valve 124 is switched to the outside outlet 1241, the carrier gas flow rate device 122 of the measurement chamber 12 is controlled so that the carrier gas purges the measurement chamber 12 at a constant flow rate, and the purged carrier gas is discharged from the outside outlet 1241.
It should be noted that the steps of evacuating the sample gas chamber 11 and the measurement chamber 12 for the residual and adsorbed target components may be performed simultaneously, or may be performed sequentially, for example, the steps of evacuating the sample gas chamber 11 for the residual and adsorbed target components, and then evacuating the measurement chamber 12 for the residual and adsorbed target components; alternatively, the target component remaining and adsorbed in the measurement chamber 12 is evacuated first, and the target component remaining and adsorbed in the sample gas chamber 11 is evacuated, which is not particularly limited herein.
Specifically, referring to fig. 2 and 4, the carrier gas source 40 is connected to the measurement chamber 12 through the carrier gas inlet valve 121 and the carrier gas flow meter 122, and the carrier gas inlet valve 121 is opened to control the carrier gas flow meter 122 to purge the measurement chamber 12 with a certain flow rate of the carrier gas. The purged carrier gas is discharged from the external discharge port 1241, and the target component in the measuring chamber 12 is taken out in the process of discharging the carrier gas, so that the accuracy of background error measurement can be ensured, and the precision of the barrier property test is improved. Furthermore, it is understood that the outlet valve 124 is provided with an outer discharge outlet 1241 and a measurement outlet 1242, the measurement outlet 1242 being in communication with the component detecting member 60; if the outlet valve 124 is switched to the measurement outlet 1242, the carrier gas in the measurement chamber 12 flows through the component detecting member 60 through the measurement outlet 1242 to detect the content of the target component in the measurement chamber 12; if the outlet valve 124 is switched to the external discharge port 1241, the carrier gas in the measurement chamber 12 is discharged through the external discharge port 1241. In the process of emptying the target component in the measurement chamber 12, the carrier gas is discharged out of the measurement chamber 12 through the discharge port 1241, so that the carrier gas does not flow through the component detection piece 60, the component detection piece 60 is prevented from being polluted, the accuracy of background error measurement is ensured, and the precision of the barrier property test is improved.
The outlet valve 124 may be a three-way valve or other valve assembly.
In one embodiment, referring to fig. 1, 2 and 4, the step of evacuating the residual and adsorbed target components in the sample gas chamber 11 and the measurement chamber 12 further comprises:
s17, keeping the carrier gas inlet valve 121 of the measuring chamber 12 in an open state;
s18, opening the protection valve 123 of the measuring chamber 12;
s19, the outlet valve 124 is switched to the measurement outlet 1242, the carrier gas flow meter 122 of the measurement chamber 12 is controlled to make the carrier gas flow through the measurement chamber 12, the measurement outlet 1242 and the component detection element 60 at a certain flow rate, the component detection element 60 performs target component detection on the discharged carrier gas, and the background error value of the barrier performance tester is calculated.
In one embodiment, after the step S10 of purging the carrier gas from the sample gas chamber 11 and the measurement chamber 12, exhausting the residual and adsorbed target components in the sample gas chamber 11 and the measurement chamber 12, detecting the content of the target components in the carrier gas flowing through the measurement chamber 12 after a period of time, and calculating the background error of the barrier performance tester, the method further includes:
s40, judging whether the background error is larger than a preset value: and if the background error is larger than the preset value, sending out an alarm, and selecting to test or stopping the test. If the background error is less than the preset value, no warning is sent, the test gas is directly loaded into the sample gas chamber 11, enters the measurement chamber 12 through the test sample 20, the content of the target component in the carrier gas flowing through the measurement chamber 12 is detected, and the test permeation quantity is calculated.
It should be noted that the preset value is the maximum value of the background error when the test specimen 20 is well mounted. In step S40, when the background error is greater than the preset value, a warning is issued to remind the operator that the test sample 20 is incorrectly installed, and the operator may choose to continue to execute step S20 or stop executing step S20. In step S40, when the background error is smaller than the preset value, it indicates that the test specimen 20 is installed successfully, no warning is issued, and step S20 is directly performed.
In step S10, the target components in the sample gas chamber 11 and the measurement chamber 12 are purged, and after a while, the outside gas enters the measurement chamber 12 from the position of the mounting error, the carrier gas carries the target components from the measurement chamber 12 through the measurement outlet 1242 and the component detecting member 60, and the component detecting member 60 detects the target components of the discharged carrier gas. When the measurement signal of the component detection piece 60 is stable, the background error of the barrier property tester is calculated according to the measurement value of the component detection piece 60, so that the accuracy of the background error can be ensured, and the precision of the barrier property test is improved.
Specifically, the component detecting member 60 detects the target component concentration P0After the concentration of the target component is stable, calculating the background error value R of the barrier property tester0. The calculation formula is as follows:
R0＝k(T)*F0*P0/S；
in the formula, F0The background carrier gas flow rate; s is the penetration area of the test sample 20; k (T) is a measurement parameter of the barrier property tester, where k (T) is related to the test temperature T of the test sample 20.
In one embodiment, referring to fig. 3 and 4, the step S20 of loading the sample cell 11 with the test gas, passing the test sample 20 into the measurement cell 12, detecting the content of the target component in the carrier gas flowing through the measurement cell 12, and calculating the test permeation amount includes:
s21, closing the background carrier gas flow device 114 and the background carrier gas inlet valve 112;
s22, the test gas inlet valve 111 and the exhaust valve 113 of the sample gas chamber 11 are opened, the sample gas chamber 11 is loaded with the test gas, and the test gas is exhausted from the sample gas chamber 11 through the exhaust valve 113.
The sample gas chamber 11 is loaded with a test gas, the test gas passes through the test sample 20 from the sample gas chamber 11 and enters the measurement chamber 12, and the target component can be measured by the component detection element 60, thereby obtaining a test permeation amount.
Further, referring to fig. 3 and 4, after step S22 of opening the test gas inlet valve 111 and the exhaust valve 113 of the sample gas chamber 11, loading the sample gas chamber 11 with the test gas, and exhausting the test gas from the sample gas chamber 11 through the exhaust valve 113, the method further includes:
s23, loading carrier gas into the measuring chamber 12;
s24, opening the protection valve 123 of the measuring chamber 12;
s25, the exhaust valve 113 is switched to the measurement outlet 1242, the carrier gas flow rate meter 122 of the measurement chamber 12 is controlled so that the carrier gas flows from the measurement chamber 12 through the measurement outlet 1242 and the component detection element 60 at a constant flow rate, and the component detection element 60 detects a target component of the discharged carrier gas and calculates a test permeation amount.
Specifically, in step S23 of loading the carrier gas into the measurement chamber 12, the carrier gas inlet valve 121 of the measurement chamber 12 is opened, and the carrier gas flow rate meter 122 is controlled so that the carrier gas enters the measurement chamber 12 at a constant flow rate.
In one embodiment, the sample gas chamber 11 is loaded with a test gas, the test gas enters the measurement chamber 12 through the test sample 20, the content of the target component in the carrier gas flowing through the measurement chamber 12 is detected, and the content of the target component in the measurement chamber 12 is detected when the target component in the sample gas chamber and the target component in the measurement chamber 12 reach equilibrium in step S20 of calculating the test permeation amount. It will be appreciated that the test gas in the sample gas chamber 11 will permeate through the test sample 20 into the measurement chamber 12, and over time, the permeation will equilibrate and the content of the target component in the measurement chamber 12 and the content of the target component in the sample gas chamber 11 will tend to stabilize. When the target components of the sample gas chamber 11 and the measurement chamber 12 reach balance, the measurement permeability is calculated according to the measurement value of the component detection piece 60, so that the accuracy of the measurement permeability can be ensured, and the precision of the barrier property test is improved.
In step S20, after the test gas in the sample gas chamber 11 enters the measurement chamber 12 through the test sample 20, the carrier gas drives the target component to flow from the measurement chamber 12 through the measurement outlet 1242 and the component detecting element 60, and the component detecting element 60 performs the target component content P on the discharged carrier gastDetecting, calculating to obtain the testing permeability R after the content of the target component is stablet. The calculation formula is as follows:
Rt＝k(T)*Ft*Pt/S；
in the formula, FtIs the carrier gas flow rate; s is the penetration area of the test sample 20; k (T) is a measurement parameter of the barrier property tester, where k (T) is related to the test temperature T of the test sample 20.
Background error R of barrier property tester to be measured0And testing the penetration RtThen, the gas permeation amount R of the sample was calculated by the following formula:
R＝Rt-R0；
referring to fig. 4, an embodiment of a barrier performance testing system employs any of the barrier performance testing methods of the embodiments. The barrier property test system further comprises a test gas source 30, a test gas inlet valve 111, a carrier gas source 40, a background carrier gas inlet valve 112, a carrier gas inlet valve 121, a temperature and humidity detection piece 50 and a component detection piece 60, wherein the test gas source 30 is communicated with the sample gas chamber 11 through the test gas inlet valve 111, and the temperature and humidity detection piece 50 measures the temperature and humidity of the sample gas chamber 11. The carrier gas source 40 is communicated with the sample gas chamber 11 through the background carrier gas inlet valve 112, the carrier gas source 40 is communicated with the measuring chamber 12 through the carrier gas inlet valve 121, and the component detecting member 60 detects the content of the target component in the measuring chamber 12.
The barrier performance test system adopts the barrier performance test method to test the barrier performance. Due to the installation error of the test sample 20, for example, the sealing joint of the test sample 20 and the measurement chamber 12, the volatilization of the sealing grease 13 at the sealing joint, and the installation error of the components of the measurement chamber 12, the external air enters the measurement chamber 12, thereby affecting the accuracy of the barrier performance test. Therefore, the scheme measures the background error of the obstruction tester, and particularly evacuates residual and adsorbed target components in the sample air chamber 11 and the measuring chamber 12 through carrier gas; after a period of time, the external gas enters the measuring chamber 12 from the positions of the test sample 20 and the installation errors of the components of the measuring chamber 12, the content of the target component in the carrier gas flowing through the measuring chamber 12 is detected, and the background error of the barrier property tester is calculated. The gas permeability of the sample can be obtained by calculating the difference between the test permeability and the background error, so that the influence of the installation error of the test sample 20 and the installation error of the measurement chamber 12 component on the barrier performance measurement can be eliminated, and the test precision of the barrier test performance is improved.
Further, referring to fig. 4 to 6, the barrier performance testing system further includes a sealing ring 14 and a sealing grease 13, the sealing ring 14 is disposed between the test sample 20 and the sample gas chamber 11, and the sealing grease 13 is disposed between the test sample 20 and the measuring chamber 12. By providing the sealing grease 13 and the sealing ring 14, the sealing performance between the sample chamber 11 and the measurement chamber 12 can be ensured.
In one embodiment, referring to fig. 5 and 6, the test chambers 10 are provided with at least two, the carrier gas source 40 is connected to the sample gas chamber 11 of each test chamber 10 through the background carrier gas inlet valve 112, and the carrier gas source 40 is connected to the measurement chamber 12 of each test chamber 10 through the carrier gas inlet valve 121. The testing gas source 30 is communicated with the sample gas chamber 11 of each testing chamber 10 through the testing gas inlet valve 111, each sample gas chamber 11 is correspondingly provided with a temperature and humidity detecting piece 50, and each measuring chamber 12 is correspondingly provided with a component detecting piece 60. Alternatively, one component detecting member 60 is provided, and the component detecting member 60 can measure the content of the target component in each measuring chamber 12, so that time-division multiplexing of the component detecting member 60 is realized, and the cost is saved. By providing at least two test chambers 10, it is possible to simultaneously measure a plurality of test samples 20, thereby improving the efficiency of gas permeability measurement.
The test specimen 20 may be a film, a foil, or the like, or may be a container, and the test specimen 20 is not particularly limited herein.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for testing barrier property is provided, a barrier property tester is provided, a test sample divides a test chamber into a sample gas chamber and a measurement chamber, and the method for testing barrier property is characterized by comprising the following steps:
purging carrier gas to the sample gas chamber and the measuring chamber, emptying residual and adsorbed target components in the sample gas chamber and the measuring chamber, detecting the content of the target components in the carrier gas flowing through the measuring chamber after a period of time, and calculating the background error of the barrier property tester;
loading a test gas into the sample gas chamber, wherein the test gas enters the measuring chamber through the test sample, detecting the content of a target component in the carrier gas flowing through the measuring chamber, and calculating the test permeability;
and calculating the difference value of the test permeability and the background error to obtain the gas permeability of the sample.
2. The barrier property testing method according to claim 1, wherein in the step of purging a carrier gas to the sample gas chamber and the measuring chamber, evacuating the sample gas chamber and the measuring chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measuring chamber after a certain period of time, and calculating the background error of the barrier property tester, the sample gas chamber and the measuring chamber are purged with a high purity gas containing no target components.
3. The barrier property testing method of claim 1, wherein the step of purging a carrier gas to the sample gas chamber and the measurement chamber, evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber after a period of time, and calculating the background error of the barrier property tester comprises:
closing the test gas inlet valve of the sample gas chamber;
opening a background carrier gas inlet valve and an exhaust valve of the sample gas chamber;
and controlling a background carrier gas flow meter of the sample gas chamber to enable carrier gas to purge the sample gas chamber at a certain flow rate, and discharging the purged carrier gas through the exhaust valve.
4. The barrier property testing method of claim 3, wherein the step of purging a carrier gas to the sample gas chamber and the measurement chamber, evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber after a period of time, and calculating the background error of the barrier property tester further comprises:
opening a carrier gas inlet valve of the measuring chamber;
closing a protection valve of the measurement chamber;
and switching an outlet valve of the measuring chamber to an external discharge port, controlling a carrier gas flow device of the measuring chamber to enable the carrier gas to purge the measuring chamber at a certain flow rate, and discharging the purged carrier gas from the external discharge port.
5. The method of claim 4, wherein the step of evacuating the sample gas chamber and the measurement chamber of residual and adsorbed target components is followed by the steps of:
maintaining a carrier gas inlet valve of the measurement chamber in an open state;
opening a protection valve of the measurement chamber;
and switching the outlet valve to a measurement outlet, controlling a carrier gas flow device of the measurement chamber to enable carrier gas to flow through the measurement chamber, the measurement outlet and the component detection part at a certain flow rate, and after a period of time, performing target component detection on the discharged carrier gas by the component detection part to calculate the background error value of the barrier performance tester.
6. The barrier performance testing method of claim 1, wherein the steps of purging a carrier gas to the sample gas chamber and the measurement chamber, evacuating the sample gas chamber and the measurement chamber from residual and adsorbed target components, detecting the content of the target components in the carrier gas flowing through the measurement chamber after a period of time, and calculating a background error of the barrier performance tester further comprise:
judging whether the background error is larger than a preset value: if the background error is larger than the preset value, sending out an alarm, and selecting to test or stopping the test; if the background error is smaller than the preset value, no warning is sent, the test gas is directly loaded into the sample gas chamber, the test gas enters the measuring chamber through the test sample, the content of the target component in the carrier gas flowing through the measuring chamber is detected, and the test permeation amount is calculated.
7. A barrier property testing method according to claim 1, wherein the step of loading a test gas into the sample gas chamber, the test gas entering the measurement chamber through the test sample, detecting the content of the target component in the carrier gas flowing through the measurement chamber, and calculating the test permeation amount comprises:
loading the measurement chamber with a carrier gas;
opening a protection valve of the measurement chamber;
and switching the exhaust valve of the measuring chamber to a measuring outlet, controlling a carrier gas flow device of the measuring chamber to enable the carrier gas to flow through the measuring outlet and a component detection piece from the measuring chamber at a certain flow rate, and performing target component detection on the discharged carrier gas by the component detection piece to calculate the test permeability.
8. A barrier property test method according to claim 1, wherein in the step of loading a test gas into the sample gas chamber, the test gas entering the measurement chamber through the test sample, detecting a content of a target component in a carrier gas flowing through the measurement chamber, and calculating a test permeation amount, when the target component in the sample gas chamber and the target component in the measurement chamber reach equilibrium, the content of the target component in the measurement chamber is detected, and the measurement permeation amount is calculated from the measured value.
9. A barrier property test system characterized by using the barrier property test method according to any one of claims 1 to 8; the barrier property testing system comprises a testing gas source, a testing gas inlet valve, a carrier gas source, a background carrier gas inlet valve, a temperature and humidity detection piece and a component detection piece, wherein the testing gas source is communicated with the sample gas chamber through the testing gas inlet valve, and the temperature and humidity detection piece measures the temperature and humidity of the sample gas chamber; the carrier gas source is communicated with the sample gas chamber through the background carrier gas inlet valve, the carrier gas source is communicated with the measuring chamber through the carrier gas inlet valve, and the component detecting piece detects the content of the target component in the measuring chamber.
10. The barrier property test system of claim 9, wherein there are at least two test chambers, the carrier gas source communicates with each sample gas chamber through the background carrier gas inlet valve, the carrier gas source communicates with each measurement chamber through the carrier gas inlet valve, the test gas source communicates with each sample gas chamber through the test gas inlet valve, each sample gas chamber is correspondingly provided with the temperature and humidity detection member, each measurement chamber is correspondingly provided with the composition detection member, or one composition detection member is provided, and the composition detection member can measure the content of the target composition in each measurement chamber.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345700A (en) * | 2020-11-05 | 2021-02-09 | 上海烟草集团有限责任公司 | Device for testing migration and barrier performance of dry content packaging material |
| WO2022165915A1 (en) * | 2021-02-02 | 2022-08-11 | 广州西唐机电科技有限公司 | Detection device for detecting leakage amount and permeation amount of water and oxygen |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030074954A1 (en) * | 2001-10-19 | 2003-04-24 | Engle Frank W. | Precise measurement system for barrier materials |
| US20060236755A1 (en) * | 2005-04-25 | 2006-10-26 | General Atomics | Accelerated ultralow moisture permeation measurement |
| CN101650291A (en) * | 2009-09-04 | 2010-02-17 | 清华大学 | Test method for measuring mass transfer characteristic parameter of barrier layer on building material surface |
| CN106092827A (en) * | 2016-06-03 | 2016-11-09 | 沈阳大学 | The gas transfer diffusion coefficient measurement apparatus of a kind of thin-film material and method |
| CN107817200A (en) * | 2017-09-19 | 2018-03-20 | 兰州空间技术物理研究所 | A kind of mixed gas permeability measuring apparatus and method based on mass spectral analysis |
-
2020
- 2020-04-24 CN CN202010334946.7A patent/CN111551477B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030074954A1 (en) * | 2001-10-19 | 2003-04-24 | Engle Frank W. | Precise measurement system for barrier materials |
| US20060236755A1 (en) * | 2005-04-25 | 2006-10-26 | General Atomics | Accelerated ultralow moisture permeation measurement |
| CN101650291A (en) * | 2009-09-04 | 2010-02-17 | 清华大学 | Test method for measuring mass transfer characteristic parameter of barrier layer on building material surface |
| CN106092827A (en) * | 2016-06-03 | 2016-11-09 | 沈阳大学 | The gas transfer diffusion coefficient measurement apparatus of a kind of thin-film material and method |
| CN107817200A (en) * | 2017-09-19 | 2018-03-20 | 兰州空间技术物理研究所 | A kind of mixed gas permeability measuring apparatus and method based on mass spectral analysis |
Non-Patent Citations (1)
| Title |
|---|
| 陈联等: "薄膜材料气体微量渗透率动态流量测试方法研究", 《真空与低温》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345700A (en) * | 2020-11-05 | 2021-02-09 | 上海烟草集团有限责任公司 | Device for testing migration and barrier performance of dry content packaging material |
| WO2022165915A1 (en) * | 2021-02-02 | 2022-08-11 | 广州西唐机电科技有限公司 | Detection device for detecting leakage amount and permeation amount of water and oxygen |
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|---|---|
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